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Grade: 12
The affinity of hemoglobin for O2 is
1. Decreased in rapidly metabolizing tissues
2. Increased at higher than normal body temperatures
3. Increased at higher than normal blood 2,3-DPG levels
4. Decreased at more basic than normal blood pH
4) The primary stimulus or stimuli for the respiratory center is/are _________.
2. 3.
carbon dioxide and hydrogen ions
oxygen gas levels in the blood
oxygen gas levels in the hemoglobin
conscious feeling for the need for more oxygen
5) Any lung disease that reduces the forced expiratory volume (FEV), but does not significantly affect the vital capacity is categorized purely as a(n) ____________.
1. restrictive lung disorder
2. pulmonary fibrosis
3. chronic obstructive pulmonary disease
4. obstructive lung disorder
6) Which of the following changes does not occur when a fetus is delivered
and begins to breathe on its own for the first time?
1. the rate of blood flow through
pulmonary circulation decreases
2. the foramen ovale closes
3. the ductus arteriosus closes
4. the resistance to blood flow
through the lung decreases
7) Lung surfactant is produced by ______________.
one year ago

Answers : (1)

Apurva Sharma
196 Points
The correct answer for first question is option 2.
And please post one question at a time.
Hope it helps!
one year ago
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